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-rw-r--r--drivers/gpu/drm/i915/i915_drv.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index caec1fd..8e3eb5e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -313,6 +313,10 @@ typedef struct drm_i915_private {
u32 reg0;
} *gmbus;
+ /** gmbus_mutex protects against concurrent usage of the single hw gmbus
+ * controller on different i2c buses. */
+ struct mutex gmbus_mutex;
+
struct pci_dev *bridge_dev;
struct intel_ring_buffer ring[I915_NUM_RINGS];
uint32_t next_seqno;
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